Question

number of bytes required to store 512x512 image with 256 gray levels

Answer 1

Thus the total number of bytes are 26,220 bytes.

Explanation:

To calculate the image size you need to multiply the the number of total pixels to get the total number of bits needed to store the images.

This is  512 x 512 x 8 = 2,097,52 bits

Now multiply with 0.125

2,097,52 bits x 0.125 = 26,219 bytes

Now round off the numbers

26,220 bytes

Thus the number of bytes are 26,220 bytes.